Seat-post clamp.



Patented 06f. 3, |899.

Na. 634,053.V

w. H. vl-'Auenv SEAT -PUST CL'HP. Appunti am any sa, 1697.)

(No Model.)

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UNITED STATES PATENT OFFICE.

WILLIAM II. FAUBEE, lor vcIIIoi-ieo, ILLINOIS.

SEAT-POST CLjAlVl P.

' SPECIFICATION forming part of Letters-Patent No. 634,058, datedOctober 3, 1899..

Application filed May 22, 1897. Serial llo. 637.665. (No model.)

To all. whom, it may concern? y Be it known that I, WILLIAM H. FAUBER,

of Chicago, in the county ofCook and State oi" Illinois, haveinventedcertain new and useful Improvements in Seat-Post Clamps 5 and I doherebydeclare that the following is a full,

clear, and exact description thereof, reference v being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to an improved seat` of the same as seen from thelower end. Fig.

at is a view, similar to Fig. l, of another form of clamp embodying myinvention. Fig. 5 is a side View of the form of tapered split sleeveshown in said Fig. 4. Fig. 6 is asectional View taken on line ll 6 ofFig. 4.

As shown in said drawings, Figs. l, 2, and 3, Aindicates the seat-postfitting, A and A2 the upper tubular frame member and seat-post framemember, and A3 one of the rear-fork members. Said seat-post Iitting isprovided with a tapered bore or socket ct, of greater diameter at itsupper than at its lower end. Preferably the seat-post frame member A2terminates in the lower part of the fitting A', and the body portion ofthe fittingv consists of a closed or continuous tube without openingsWhere the thimbles for attachment of the frame-pieces Aand A? join thesame, so that the bore a is smooth and continuous.

B indicates the seat-post, which has la cyy lindric outer surface, andwhich is', asfherein shown, tubular in construction. l C indicates atapered split sleeve which surrounds the seat-post and enters thetapered bore or socket o, the outer surface ofthe said sleeve beingtapered to correspond with the taper of the socket. .Said sleeve C ismovable endwise on the seat-post and is adj ustably secured thereto bylocking means adapted to positively lock or hold the sleeve fromvertical movement on the post. The locking or holding means herein shownfor this purpose consists of a plurality of holes h b in the post andaholding-stud c in the sleeve. The sleeve is split lengthwise in suchmanner as to allow 'the expansion and contraction of its part whichenters between the seat-post and the seat-'posttting As shown in saidFigs. 1, 2,

yand', the said sleeve is tapered in its lower portion and at its upperend is provided with a thickened part or flange C', in whichV theholding-stud c is secured. Said stud in this instance is a screw-studhaving screw-threaded engagement with an aperture in the flange C andhaving a cylindric projection at its inner end adapted t'o-engage one ofthe holes l) in the seat-post. The sleeve thus made with aflange C' issplit throughout its entire length and through the ilange at one point(indicated by c) and split throu'gh'its tapered portion and up to theflange C' at two other places, as indicated by the slots c2 c2. By sosplitting the sleeve the tapered parts of. the same which enter betweenthe fitting and seat-post are elastic and are adapted to yield or springin such manner as to adjust themselves perfectly to theV adjacent parts,so that when the sleeve is secured to the seat-post and the latter isthen -thrust'downwardl'y through the tting, so as to force the taperedsleeve into the tapered socket of the fitting, the split parts of thesleevewill press equally with a wedge action on both the post and thefitting. The taper of the sleeve and its :socket is such that the sleeveand post to which it is locked will be held frictionally againstmovement under ordinary pressure or strains, the contact-surfaces beingof course accurately fitted to each ot-her. vA rigid connection of thepost with the fitting by the clamping ot' the wedgeshaped sleeve in itssocket is of course promoted by the Weight of the rider, which ten dsuto force the sleeve farther into the socket.

The operation of the device is obvious, the post being secured in placeby merely forcing the sleeve in the socket .by downward pressure on thepost, and beingloosened or detached by pulling upwardly or outwardlyupon the post. The height of the saddle `Will be adjusted by shiftingthe wsleeve upon the post, this being accomplished by loosening theholding-stud c and sliding the sleeve along the post until theholding-stud can he inserted in one of the holes ol the post above orbelow the one in which it was previously located, as necessary to bringthe saddle tothe desired position. Y

In the construction shown in Figs. 4, 5, and G the parts are made in thesame manner as before described, with the following exceptions: Thesleeve C2 is in this instance without any flange orcollar at its upperend, but is split in the same manner as the one before described, slitsO4 extending through the full length of one of the sleeves,while twoothers, C C5, reach to points short of the uppernedge of the sleeve. Aholding-pieeeE is provided in this instance, the same consisting of a eylindric wire or piece of metal bent into L form to form a holdingprojection e and a shank E. The shank part is fitted in a longitudinalslot e3, Fig. 5, formed in the sleeve (Y beiow the upper end of thesaine, the parts being so constructed that when the shank is inserted inthe slot its holding projection c extends through one of theholes b ofthe seat-post B.

rlhe slot c3 is made ot' the saine length as the holding-piece E, sothat the latter engages at both its ends with the ends of the slot. Thisconstruction insures the rigid locking of the sleeve on the post whenthe piece E is engaged with the sleeve and post. Said shank e extendsoutwardly beyond the outer face ofthe sleeve and fits within a verticalgroove or socket ct', formed in the adjacent inner face of the fittingA4. Said locking-piece E thus constructed serves not only to hold thesleeve from endwisc movement on the post, but byits engagement with thesocket a2 prevents the post and sleeve from turning or rotating in thesaid socket. lThe removal and adjustment of the seat-post may beaccomplished in this lat-.

ter construction in the sa me way as in the lirstdescribed, it beingobvious that the seat-post may be removed from the fitting by pullingupwardly thereon and that the shit' ting of the sleeve may be easilyaccomplished by remov ingthe holding-piece E and moving the sleeve alongYthe post until it reaches a point where the pin can be again insertedin one of the holes of the seat-post. Obviously the projecting part ofthe holding-piece E may be slid from above into the groove a' and whenengaged with said groove will hold the sleeve and seat-post fromrotation. l

The construction illustrated in Figs. et, 5, and 6 has the advantageover that shown in Figs. l, 2, and 3 of affording a positive lock orholding device to prevent the twisting or turning of the seat-post understrains coming upon the saddle.v

The device as a whole has the advantage of great simplicity andcheapness of construc tion combined with the requisite security in theholding of the seat-post in position.

I claim as my inventionl. The combination with a tapered seatpost socketand a cylindric seat-post, of a tapered split sleeve surrounding theseatpost, said sleeve being adjustably secured to the seat-post by meansacting to hold the sleeve from eudwisev movement on the seatpost whenplaced in a desired position thereon.

2. The combination with a tapered seatpost socket and a cylindricseat-post, of a tapered, split sleeve surrounding the seatpost andfitting within the socket, said post being provided with locking-holes,and the sleeve with a locking projection for adjustably securing thesleeve to the seat-post.

3. The combination with a tapered seatpost socket and a cylindricseat-post, of a tapered, split sleeve surrounding the seatpost andfitting within the socket, said post being provided with locking-holes,and the sleeve with a stud, movably secured to said sleeve, foradjustably securing the sleeve to the post.

et. The combination with a tapered seatpost socket, and a cylindricseat-post, of a tapered `split sleeve surrounding the seatpost andfitting the socket, means for adjustq ably securing the sleeve to thescat-post, and interfitting parts on the sleeve and socket for holdingthe sleeve from turning in the socket.

5. The combination with a tapered seatpost socket and a cylindricseat-post, of a tapered split sleeve surrounding the post and fittingthe socket and a holdingpiece constructed to engage the said seat-post,sleeve and soeketfor locking the sleeve to the seatpost and for holdingthe sleeve and post from turning within the socket.

G. The combination with a tapered seatpost socket, and a cylindricseat-post provided with a plurality of locking-holes, of a tapered splitsleeve surrounding the seatpost and fitting the socket, and aholdingpiece provided with a holding projection to engage said holes,said sleeve and socket being provided with opposite recesses adapted toreceive said holding-piece.

In testimony that I claim the foregoing as myinvention I affix mysignature, in presence of two witnesses, this 17th day of May, A. D.1897.

WILLIAM H. FAUBER. Vitnesses:

TAYLOR A. BROWN, R. CUTHBERT VivIAN.

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